IANA Allocation Guidelines for the Address Resolution Protocol (ARP)
The information below is for an old version of the document that is already published as an RFC.
This is an older version of an Internet-Draft that was ultimately published as RFC 5494.
|Authors||Jari Arkko , Carlos Pignataro|
|Last updated||2015-10-14 (Latest revision 2009-02-11)|
|RFC stream||Internet Engineering Task Force (IETF)|
|IESG||IESG state||RFC 5494 (Proposed Standard)|
|Responsible AD||Russ Housley|
|Send notices to||(None)|
Network Working Group J. Arkko Internet-Draft Ericsson Updates: C. Pignataro 826,951,1044,1329,2131,2132,2176,2225,2834,2835,3315,4338,4361,4701Cisco (if approved) February 12, 2009 Intended status: Standards Track Expires: August 16, 2009 IANA Allocation Guidelines for the Address Resolution Protocol (ARP) draft-arkko-arp-iana-rules-06 Status of this Memo This Internet-Draft is submitted to IETF in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on August 16, 2009. Copyright Notice Copyright (c) 2009 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Arkko & Pignataro Expires August 16, 2009 [Page 1] Internet-Draft ARP IANA Rules February 2009 Abstract This document specifies the IANA guidelines for allocating new values in the Address Resolution Protocol (ARP). This document also reserves some numbers for experimentation purposes. The changes also affect other protocols that employ values from the ARP name spaces. 1. Introduction This document specifies the IANA guidelines [RFC5226] for allocating new values for various fields in the Address Resolution Protocol (ARP) [RFC0826]. The change is also applicable to extensions of ARP that use the same message format, such as [RFC0903], [RFC1931], and [RFC2390]. The change also affects other protocols that employ values from the ARP name spaces. For instance, the ARP hardware address type (ar$hrd) number space is also used in the "htype" (hardware address type) fields in Bootstrap Protocol (BOOTP) [RFC0951] and Dynamic Host Configuration Protocol (DHCP) [RFC2131], as well as in the "hardware type" field in the DHCP Unique Identifiers in DHCPv6 [RFC3315]. These protocols are therefore affected by the update in the IANA rules. Other affected specifications include the specialized address resolution mechanisms in HYPERchannel [RFC1044], DHCP options [RFC2132], [RFC4361], ATM (Asynchronous Transfer Mode) ARP [RFC2225], HARP (High-Performance Parallel Interface ARP) [RFC2834], [RFC2835], Dual MAC FDDI (Fiber Distributed Data Interface) ARP [RFC1329], MAPOS (Multiple Access Protocol over Synchronous Optical Network/ Synchronous Digital Hierarchy) ARP [RFC2176], FC (Fibre Channel) ARP [RFC4338], and the DNS DHCID Resource Record [RFC4701]. The IANA guidelines are given in Section 2. Previously, no IANA guidance existed for such allocations. The purpose of this document is to allow IANA to manage number assignments based on these guidelines in a consistent manner. This document also reserves some numbers for experimentation purposes. These numbers are given in Section 3. 2. IANA Considerations The following rules apply to the fields of ARP: Arkko & Pignataro Expires August 16, 2009 [Page 2] Internet-Draft ARP IANA Rules February 2009 ar$hrd (16 bits) Hardware address space Requests for ar$hrd values below 256 or a batch of more than one new value are made through Expert Review [RFC5226]. Note that certain protocols, such as BOOTP and DHCPv4 employ these values within a 8 bit field. The expert should determine that the need to allocate the new values exists and that the existing values are insufficient to represent the new hardware address types. The expert should also determine the applicability of the request, and assign values higher than 255 for requests that do not apply to BOOTP/DHCPv4. Similarly, the expert should assign one-octet values for requests that apply to BOOTP/DHCPv4, as for example the "IPsec tunnel" with value 31 [RFC3456]. Conversely, ARP-only uses without a foreseeable reason to use the same value in BOOTP/DHCPv4 should favor 2-octet values. Requests for individual new ar$hrd values that do not specify a value, or where the requested value is greater than 255, are made through First Come First Served [RFC5226]. The assignment will always result in a 2-octet value. ar$pro (16 bits) Protocol address space These numbers share the Ethertype space. The Ethertype space is administered as described in [RFC5342]. ar$op (16 bits) Opcode Requests for new ar$op values are made through IETF Review or IESG Approval [RFC5226]. Upon the approval of this specification, IANA should update all three registration policies listed in arp-parameters registry as specified in the above list, and add a reference to either this RFC or RFC 5342, as appropriate. RFC Editor: This paragraph can be removed upon publication. 3. Allocations Defined in This Document When testing new protocol extension ideas, it is often necessary to use an actual constant in order to use the new function, even when testing in a closed environment. This document reserves the following numbers for experimentation purposes in ARP: o Two new ar$hrd values are allocated for experimental purposes, HW_EXP1 (TBD-BY-IANA-1, but below 256) and HW_EXP2 (TBD-BY-IANA-2, Arkko & Pignataro Expires August 16, 2009 [Page 3] Internet-Draft ARP IANA Rules February 2009 but above 255 and preferably with different values in the least and most significant octets). o Two new values for the ar$op are allocated for experimental purposes, OP_EXP1 (TBD-BY-IANA-3, any value will be sufficient) and OP_EXP2 (TBD-BY-IANA-4, any value will be sufficient). Note that [RFC5342], Section B.2 lists two Ethertypes that can be used for experimental purposes. In addition, for both ar$hrd and ar$op the values 0 and 65535 are marked as reserved. This means that they are not available for allocation. Upon the approval of this specification, IANA should add the two new allocations and two reserved values for both ar$hrd and ar$op to the arp-parameters registry, and reference this RFC. RFC Editor: This paragraph can be removed upon publication. 4. Security Considerations This specification does not change the security properties of the affected protocols. However, a few words are necessary about the use of the experimental code points defined in Section 3. Potentially harmful side-effects from the use of the experimental values needs to be carefully evaluated before deploying any experiment across networks that the owner of the experiment does not entirely control. Guidance given in [RFC3692] about the use of experimental values needs to be followed. 5. Acknowledgments The lack of any current rules has come up as new values were requested from IANA and they contacted IESG for advice. The author would like to thank Michelle Cotton in particular for bringing this issue up. The author would also like to thank Brian Carpenter, Thomas Narten, Scott Bradner, Donald Eastlake, Andrew G. Malis, Brian Haberman, Robert Sparks, Larry Zhu, and Dave Thaler for feedback. 6. References Arkko & Pignataro Expires August 16, 2009 [Page 4] Internet-Draft ARP IANA Rules February 2009 6.1. Normative References [RFC0826] Plummer, D., "Ethernet Address Resolution Protocol: Or converting network protocol addresses to 48.bit Ethernet address for transmission on Ethernet hardware", STD 37, RFC 826, November 1982. [RFC0951] Croft, B. and J. Gilmore, "Bootstrap Protocol", RFC 951, September 1985. [RFC1044] Hardwick, K. and J. Lekashman, "Internet Protocol on Network System's HYPERchannel: Protocol specification", STD 45, RFC 1044, February 1988. [RFC1329] Kuehn, P., "Thoughts on Address Resolution for Dual MAC FDDI Networks", RFC 1329, May 1992. [RFC2131] Droms, R., "Dynamic Host Configuration Protocol", RFC 2131, March 1997. [RFC2132] Alexander, S. and R. Droms, "DHCP Options and BOOTP Vendor Extensions", RFC 2132, March 1997. [RFC2176] Murakami, K. and M. Maruyama, "IPv4 over MAPOS Version 1", RFC 2176, June 1997. [RFC2225] Laubach, M. and J. Halpern, "Classical IP and ARP over ATM", RFC 2225, April 1998. [RFC2834] Pittet, J., "ARP and IP Broadcast over HIPPI-800", RFC 2834, May 2000. [RFC2835] Pittet, J., "IP and ARP over HIPPI-6400 (GSN)", RFC 2835, May 2000. [RFC3315] Droms, R., Bound, J., Volz, B., Lemon, T., Perkins, C., and M. Carney, "Dynamic Host Configuration Protocol for IPv6 (DHCPv6)", RFC 3315, July 2003. [RFC3692] Narten, T., "Assigning Experimental and Testing Numbers Considered Useful", BCP 82, RFC 3692, January 2004. [RFC4338] DeSanti, C., Carlson, C., and R. Nixon, "Transmission of IPv6, IPv4, and Address Resolution Protocol (ARP) Packets over Fibre Channel", RFC 4338, January 2006. [RFC4361] Lemon, T. and B. Sommerfeld, "Node-specific Client Identifiers for Dynamic Host Configuration Protocol Arkko & Pignataro Expires August 16, 2009 [Page 5] Internet-Draft ARP IANA Rules February 2009 Version Four (DHCPv4)", RFC 4361, February 2006. [RFC4701] Stapp, M., Lemon, T., and A. Gustafsson, "A DNS Resource Record (RR) for Encoding Dynamic Host Configuration Protocol (DHCP) Information (DHCID RR)", RFC 4701, October 2006. [RFC5226] Narten, T. and H. Alvestrand, "Guidelines for Writing an IANA Considerations Section in RFCs", BCP 26, RFC 5226, May 2008. [RFC5342] Eastlake. , D., "IANA Considerations and IETF Protocol Usage for IEEE 802 Parameters", BCP 141, RFC 5342, September 2008. 6.2. Informative References [RFC0903] Finlayson, R., Mann, T., Mogul, J., and M. Theimer, "Reverse Address Resolution Protocol", STD 38, RFC 903, June 1984. [RFC1931] Brownell, D., "Dynamic RARP Extensions for Automatic Network Address Acquisition", RFC 1931, April 1996. [RFC2390] Bradley, T., Brown, C., and A. Malis, "Inverse Address Resolution Protocol", RFC 2390, September 1998. [RFC3456] Patel, B., Aboba, B., Kelly, S., and V. Gupta, "Dynamic Host Configuration Protocol (DHCPv4) Configuration of IPsec Tunnel Mode", RFC 3456, January 2003. Appendix A. Changes from the Original RFCs This document specifies only the IANA rules associated with various fields in ARP. The specification of these rules also affects the allocation of corresponding fields in protocols listed in Section 1 that share the registry. This document does not make any changes in the operation of these protocols themselves. Arkko & Pignataro Expires August 16, 2009 [Page 6] Internet-Draft ARP IANA Rules February 2009 Authors' Addresses Jari Arkko Ericsson Jorvas 02420 Finland Email: firstname.lastname@example.org Carlos Pignataro Cisco Systems 7200-12 Kit Creek Road PO Box 14987 Research Triangle Park, NC 27709 USA Email: email@example.com Arkko & Pignataro Expires August 16, 2009 [Page 7]